the heart
Heart
Endocardium
endocardium
Interventricular Septum
The endocardium
The endocardium is the innermost layer of the heart wall.
The answer is endocardium. Hope it helps!!
the heart
endocardium
endocardium
endocardium
Endocardium.
Endocardium
endocardium
epicardium, myocardium and endocardium
endocardium